We have studied the multi-photon ionization of atomic hydrogen by an intense attosecond laser pulse. We numerically integrate the time-dependent Schrodinger equation by propagating the initial H(1s) state after the onset ...

A characteristic feature in strong-field multi-photon ionization processes is the so-called Autler-Townes Doublet [1] that occurs due to the transient splitting of atomic energy levels in the
electric field of the laser ...